Race Calendar in Colorado, United States

Know. Grow. GO RUN. 5K

Loveland, Colorado, United States

15 May, 2026 (Fri)

Free

Running

5K

Black Canyon Ascent

Montrose, Colorado, United States

16 May, 2026 (Sat)

$65.00

Running, Walking

9.7K

Endure Trail Runs

Divide, Colorado, United States

16 May, 2026 (Sat)

$90.00 - $130.00

Running, Trail running

11K 22.7K Marathon

Girls on the Run 5K at Colfax - Running Buddies and Volunteers

Denver, Colorado, United States

16 May, 2026 (Sat)

Running

5K

Gluten Free Gallop 5K

Littleton, Colorado, United States

16 May, 2026 (Sat)

$20.00 - $45.00

Running

5K 2.5K

Growing Home - Colfax Fundraiser

Denver, Colorado, United States

16 May, 2026 (Sat) – 17 May, 2026

Free

Running

5K

May 16 - Never Ever MTBers & Beginners @ Bluestem - (bring a non-WMBA friend!!)

Colorado Springs, Colorado, United States

16 May, 2026 (Sat)

Spirit Challenge Run for Autism 10k and 5k

Steamboat Springs, Colorado, United States

16 May, 2026 (Sat)

$30.75 - $45.75

Running

10K 5K

The HIKE

Cascade, Colorado, United States

16 May, 2026 (Sat)

Vallecito Lake Heavy Half

Bayfield, Colorado, United States

16 May, 2026 (Sat)

$105.00

Running

22.5K

Canine On the Creek

Dumont, Colorado, United States

17 May, 2026 (Sun)

$25.00 - $40.00

Running

5K 1.6K

Girls on the Run Rockies Colfax SoleMates 2026

Denver, Colorado, United States

17 May, 2026 (Sun)

Running

Marathon Half-Marathon